<template>
  <div class="homepage-hero-module">
    <div class="video-container">
      <div :style="fixStyle" class="filter">
        <div style="width: 400px; margin: 100px auto">
          <div
            style="
              font-size: 30px;
              text-align: center;
              padding: 30px 0;
              color: #333;
            "
          >
            欢迎登录部门信息管理系统
          </div>
          <el-form ref="form" :model="form" size="normal" :rules="rules">
            <el-form-item prop="username">
              <el-input
                prefix-icon="el-icon-user-solid"
                v-model="form.username"
                placeholder="请输入账号"
              ></el-input>
            </el-form-item>
            <el-form-item prop="password">
              <el-input
                prefix-icon="el-icon-lock"
                v-model="form.password"
                show-password
                placeholder="请输入密码"
              ></el-input>
            </el-form-item>
            <el-form-item>
              <div style="display: flex">
                <el-input
                  prefix-icon="el-icon-key"
                  v-model="form.validCode"
                  style="width: 50%"
                  placeholder="请输入验证码"
                ></el-input>
                <ValidCode @input="createValidCode" />
              </div>
            </el-form-item>
            <!--            <el-form-item>-->
            <!--              <el-radio v-model="form.role" :label="1" style="color: white">管理员</el-radio>-->
            <!--              <el-radio v-model="form.role" :label="2" style="color: white">普通用户</el-radio>-->
            <!--            </el-form-item>-->
            <el-form-item>
              <el-button style="width: 100%" type="primary" @click="login"
                >登 录</el-button
              >
            </el-form-item>
            <el-form-item
              ><el-button type="text" @click="$router.push('/register')"
                >前往注册 >>
              </el-button></el-form-item
            >
          </el-form>
        </div>
      </div>
      <video
        :style="fixStyle"
        autoplay
        loop
        muted
        class="fillWidth"
        v-on:canplay="canplay"
      >
        <source src="../assets/sea.mp4" type="video/mp4" />
        浏览器不支持 video 标签，建议升级浏览器。
      </video>
    </div>
  </div>
</template>

<script>
import request from "@/utils/request";
import ValidCode from "@/components/ValidCode";
import { activeRouter } from "@/utils/permission";

export default {
  name: "Login",
  components: {
    ValidCode,
  },
  data() {
    return {
      vedioCanPlay: false,
      fixStyle: "",
      form: { role: 1 },
      rules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
        ],
        password: [{ required: true, message: "请输入密码", trigger: "blur" }],
      },
      validCode: "",
      // 加背景图片
      // bg: {
      //   backgroundImage: "url(" + require("@/assets/bg.jpg") + ")",
      //   backgroundRepeat: "no-repeat",
      //   backgroundSize: "100% 100%"
      // }
    };
  },
  mounted() {
    sessionStorage.removeItem("user");

    window.onresize = () => {
      const windowWidth = document.body.clientWidth;
      const windowHeight = document.body.clientHeight;
      const windowAspectRatio = windowHeight / windowWidth;
      let videoWidth;
      let videoHeight;
      if (windowAspectRatio < 0.5625) {
        videoWidth = windowWidth;
        videoHeight = videoWidth * 0.5625;
        this.fixStyle = {
          height: windowWidth * 0.5625 + "px",
          width: windowWidth + "px",
          "margin-bottom": (windowHeight - videoHeight) / 2 + "px",
          "margin-left": "initial",
        };
      } else {
        videoHeight = windowHeight;
        videoWidth = videoHeight / 0.5625;
        this.fixStyle = {
          height: windowHeight + "px",
          width: windowHeight / 0.5625 + "px",
          "margin-left": (windowWidth - videoWidth) / 2 + "px",
          "margin-bottom": "initial",
        };
      }
    };
    window.onresize();
  },
  methods: {
    canplay() {
      this.vedioCanPlay = true;
    },
    // 接收验证码组件提交的 4位验证码
    createValidCode(data) {
      this.validCode = data;
    },
    login() {
      this.$refs["form"].validate((valid) => {
        if (valid) {
          if (!this.form.validCode) {
            this.$message.error("请填写验证码");
            return;
          }
          if (
            this.form.validCode.toLowerCase() !== this.validCode.toLowerCase()
          ) {
            this.$message.error("验证码错误");
            return;
          }
          request.post("/user/login", this.form).then((res) => {
            if (res.code === "0") {
              this.$message({
                type: "success",
                message: "登录成功",
              });
              sessionStorage.setItem("user", JSON.stringify(res.data)); // 缓存用户信息

              // 登录成功的时候更新当前路由
              activeRouter();
              this.$router.push("/"); //登录成功之后进行页面的跳转，跳转到主页
            } else {
              this.$message({
                type: "error",
                message: res.msg,
              });
            }
          });
        }
      });
    },
  },
};
</script>

<style scoped>
.homepage-hero-module,
.video-container {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.video-container .poster img {
  z-index: 0;
  position: absolute;
}

.video-container .filter {
  z-index: 1;
  position: absolute;
  /*background: rgba(0, 0, 0, 0.4);*/
  width: 100%;
}

.fillWidth {
  width: 100%;
}
</style>
